channels/chan_h323.c

   1 /*
   2  * chan_h323.c
   3  *
   4  * OpenH323 Channel Driver for ASTERISK PBX.
   5  *                      By Jeremy McNamara
   6  *                      For The NuFone Network
   7  *
   8  * This code has been derived from code created by
   9  *              Michael Manousos and Mark Spencer
  10  *
  11  * This file is part of the chan_h323 driver for Asterisk
  12  *
  13  * chan_h323 is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * chan_h323 is distributed WITHOUT ANY WARRANTY; without even
  19  * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  20  * PURPOSE. See the GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  * Version Info: $Id$
  27  */
  28
  29
  30 #include <stdio.h>
  31 #include <pthread.h>
  32 #include <string.h>
  33 #include <asterisk/lock.h>
  34 #include <asterisk/logger.h>
  35 #include <asterisk/channel.h>
  36 #include <asterisk/channel_pvt.h>
  37 #include <asterisk/config.h>
  38 #include <asterisk/module.h>
  39 #include <asterisk/pbx.h>
  40 #include <asterisk/options.h>
  41 #include <asterisk/lock.h>
  42 #include <asterisk/sched.h>
  43 #include <asterisk/io.h>
  44 #include <asterisk/rtp.h>
  45 #include <asterisk/acl.h>
  46 #include <asterisk/callerid.h>
  47 #include <asterisk/cli.h>
  48 #include <asterisk/dsp.h>
  49 #include <sys/socket.h>
  50 #include <net/if.h>
  51 #include <errno.h>
  52 #include <unistd.h>
  53 #include <stdlib.h>
  54 #include <fcntl.h>
  55 #include <netdb.h>
  56 #include <sys/signal.h>
  57 #include <netinet/ip.h>
  58
  59
  60 #include "h323/chan_h323.h"
  61
  62 /** String variables required by ASTERISK */
  63 static char *type       = "H323";
  64 static char *desc       = "The NuFone Network's Open H.323 Channel Driver";
  65 static char *tdesc      = "The NuFone Network's Open H.323 Channel Driver";
  66 static char *config = "h323.conf";
  67
  68 static char default_context[AST_MAX_EXTENSION];
  69
  70 /** H.323 configuration values */
  71 static char gatekeeper[100];
  72 static int      gatekeeper_disable = 1;
  73 static int      gatekeeper_discover = 0;
  74 static int  usingGk;
  75 static int      port = 1720;
  76 static int  gkroute = 0;
  77
  78 /* to find user by alias is default, alternative is the incomming call's source IP
  79 address*/
  80 static int  userbyalias = 1;
  81
  82 static int  bridge_default = 1;
  83
  84 /* Just about everybody seems to support ulaw, so make it a nice default */
  85 static int capability = AST_FORMAT_ULAW;
  86
  87 /* TOS flag */
  88 static int tos = 0;
  89
  90 static int dtmfmode = H323_DTMF_RFC2833;
  91
  92 static char secret[50];
  93
  94 /** Private structure of a OpenH323 channel */
  95 struct oh323_pvt {
  96         ast_mutex_t lock;                                       /* Channel private lock */
  97         call_options_t calloptions;                             /* Options to be used during call setup */
  98         int     alreadygone;                                            /* Whether or not we've already been destroyed by or peer */
  99         int needdestroy;                                                /* if we need to be destroyed */
 100         call_details_t cd;                                              /* Call details */
 101         struct ast_channel *owner;                              /* Who owns us */
 102         int capability;                                                 /* Special capability */
 103         int nonCodecCapability;
 104         int outgoing;                                                   /* Outgoing or incoming call? */
 105         int nat;                                                                /* Are we talking to a NAT EP?*/
 106         int bridge;                                                             /* Determine of we should native bridge or not*/
 107         char exten[AST_MAX_EXTENSION];                  /* Requested extension */
 108         char context[AST_MAX_EXTENSION];                /* Context where to start */
 109         char username[81];                                              /* H.323 alias using this channel */
 110         char accountcode[256];                                  /* Account code */
 111         int amaflags;                                                   /* AMA Flags */
 112         char callerid[80];                                              /* Caller*ID if available */
 113         struct ast_rtp *rtp;                                    /* RTP Session */
 114         int dtmfmode;
 115         struct ast_dsp *vad;                                    /* Used for in-band DTMF detection */
 116         struct oh323_pvt *next;                                 /* Next channel in list */
 117 } *iflist = NULL;
 118
 119 static struct ast_user_list {
 120         struct oh323_user *users;
 121         ast_mutex_t lock;
 122 } userl = { NULL, AST_MUTEX_INITIALIZER };
 123
 124 static struct ast_peer_list {
 125         struct oh323_peer *peers;
 126         ast_mutex_t lock;
 127 } peerl = { NULL, AST_MUTEX_INITIALIZER };
 128
 129 static struct ast_alias_list {
 130         struct oh323_alias *aliases;
 131         ast_mutex_t lock;
 132 } aliasl = { NULL, AST_MUTEX_INITIALIZER };
 133
 134 /** Asterisk RTP stuff*/
 135 static struct sched_context *sched;
 136 static struct io_context *io;
 137
 138 /** Protect the interface list (of oh323_pvt's) */
 139 static ast_mutex_t iflock = AST_MUTEX_INITIALIZER;
 140
 141 /** Usage counter and associated lock */
 142 static int usecnt =0;
 143 static ast_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
 144
 145 /* Protect the monitoring thread, so only one process can kill or start it, and not
 146    when it's doing something critical. */
 147 static ast_mutex_t monlock = AST_MUTEX_INITIALIZER;
 148
 149 /* This is the thread for the monitor which checks for input on the channels
 150    which are not currently in use.  */
 151 static pthread_t monitor_thread = 0;
 152
 153 static int restart_monitor(void);
 154
 155 static void __oh323_destroy(struct oh323_pvt *p)
 156 {
 157         struct oh323_pvt *cur, *prev = NULL;
 158
 159         if (p->rtp) {
 160                 ast_rtp_destroy(p->rtp);
 161         }
 162
 163         /* Unlink us from the owner if we have one */
 164         if (p->owner) {
 165                 ast_mutex_lock(&p->owner->lock);
 166                 ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name);
 167                 p->owner->pvt->pvt = NULL;
 168                 ast_mutex_unlock(&p->owner->lock);
 169         }
 170         cur = iflist;
 171         while(cur) {
 172                 if (cur == p) {
 173                         if (prev)
 174                                 prev->next = cur->next;
 175                         else
 176                                 iflist = cur->next;
 177                         break;
 178                 }
 179                 prev = cur;
 180                 cur = cur->next;
 181         }
 182         if (!cur) {
 183                 ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
 184         } else
 185                 free(p);
 186 }
 187
 188 static void oh323_destroy(struct oh323_pvt *p)
 189 {
 190         ast_mutex_lock(&iflock);
 191         __oh323_destroy(p);
 192         ast_mutex_unlock(&iflock);
 193 }
 194
 195 static struct oh323_alias *build_alias(char *name, struct ast_variable *v)
 196 {
 197         struct oh323_alias *alias;
 198
 199         alias = (struct oh323_alias *)malloc(sizeof(struct oh323_alias));
 200
 201         if (alias) {
 202                 memset(alias, 0, sizeof(struct oh323_alias));
 203                 strncpy(alias->name, name, sizeof(alias->name)-1);
 204
 205                 while (v) {
 206                         if (!strcasecmp(v->name, "e164")) {
 207                                 strncpy(alias->e164,  v->value, sizeof(alias->e164)-1);
 208                         } else if (!strcasecmp(v->name, "prefix")) {
 209                                 strncpy(alias->prefix,  v->value, sizeof(alias->prefix)-1);
 210                         } else if (!strcasecmp(v->name, "context")) {
 211                                 strncpy(alias->context,  v->value, sizeof(alias->context)-1);
 212                         } else if (!strcasecmp(v->name, "secret")) {
 213                                 strncpy(alias->secret,  v->value, sizeof(alias->secret)-1);
 214                         } else {
 215                                 if (strcasecmp(v->value, "h323")) {
 216                                         ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->value);
 217                                 }
 218                         }
 219                         v = v->next;
 220                 }
 221         }
 222         return alias;
 223 }
 224
 225 static struct oh323_user *build_user(char *name, struct ast_variable *v)
 226 {
 227         struct oh323_user *user;
 228         int format;
 229
 230         user = (struct oh323_user *)malloc(sizeof(struct oh323_user));
 231         if (user) {
 232                 memset(user, 0, sizeof(struct oh323_user));
 233                 strncpy(user->name, name, sizeof(user->name)-1);
 234
 235                 /* set the usage flag to a sane starting value*/
 236                 user->inUse = 0;
 237                 /* Assume we can native bridge */
 238                 user->bridge = bridge_default;
 239
 240                 while(v) {
 241                         if (!strcasecmp(v->name, "context")) {
 242                                 strncpy(user->context, v->value, sizeof(user->context)-1);
 243                         } else if (!strcasecmp(v->name, "bridge")) {
 244                                 user->bridge = ast_true(v->value);
 245                       } else if (!strcasecmp(v->name, "nat")) {
 246                               user->nat = ast_true(v->value);
 247                         } else if (!strcasecmp(v->name, "noFastStart")) {
 248                                 user->noFastStart = ast_true(v->value);
 249                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
 250                                 user->noH245Tunneling = ast_true(v->value);
 251                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
 252                                 user->noSilenceSuppression = ast_true(v->value);
 253                         } else if (!strcasecmp(v->name, "secret")) {
 254                                 strncpy(user->secret, v->value, sizeof(user->secret)-1);
 255                         } else if (!strcasecmp(v->name, "callerid")) {
 256                                 strncpy(user->callerid, v->value, sizeof(user->callerid)-1);
 257                         } else if (!strcasecmp(v->name, "accountcode")) {
 258                                 strncpy(user->accountcode, v->value, sizeof(user->accountcode)-1);
 259                         } else if (!strcasecmp(v->name, "incominglimit")) {
 260                                 user->incominglimit = atoi(v->value);
 261                                 if (user->incominglimit < 0)
 262                                         user->incominglimit = 0;
 263                         } else if (!strcasecmp(v->name, "host")) {
 264                                 if (!strcasecmp(v->value, "dynamic")) {
 265                                         ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n");
 266                                         free(user);
 267                                         return NULL;
 268                                 } else if (ast_get_ip(&user->addr, v->value)) {
 269                                         free(user);
 270                                         return NULL;
 271                                 }
 272                                 /* Let us know we need to use ip authentication */
 273                                 user->host = 1;
 274                         } else if (!strcasecmp(v->name, "amaflags")) {
 275                                 format = ast_cdr_amaflags2int(v->value);
 276                                 if (format < 0) {
 277                                         ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
 278                                 } else {
 279                                         user->amaflags = format;
 280                                 }
 281                         }
 282                         v = v->next;
 283                 }
 284         }
 285         return user;
 286 }
 287
 288
 289 static struct oh323_peer *build_peer(char *name, struct ast_variable *v)
 290 {
 291         struct oh323_peer *peer;
 292         struct oh323_peer *prev;
 293         int found=0;
 294
 295         prev = NULL;
 296         ast_mutex_lock(&peerl.lock);
 297         peer = peerl.peers;
 298
 299         while(peer) {
 300                 if (!strcasecmp(peer->name, name)) {
 301                         break;
 302                 }
 303                 prev = peer;
 304                 peer = peer->next;
 305         }
 306
 307         if (peer) {
 308                 found++;
 309                 /* Already in the list, remove it and it will be added back (or FREE'd) */
 310                 if (prev) {
 311                         prev->next = peer->next;
 312                 } else {
 313                         peerl.peers = peer->next;
 314                 }
 315                 ast_mutex_unlock(&peerl.lock);
 316         } else {
 317                 ast_mutex_unlock(&peerl.lock);
 318                 peer = malloc(sizeof(struct oh323_peer));
 319                 memset(peer, 0, sizeof(struct oh323_peer));
 320         }
 321         if (peer) {
 322                 if (!found) {
 323                         strncpy(peer->name, name, sizeof(peer->name)-1);
 324                 }
 325
 326                 /* set the usage flag to a sane starting value*/
 327                 peer->inUse = 0;
 328
 329                 while(v) {
 330                         if (!strcasecmp(v->name, "context")) {
 331                                 strncpy(peer->context, v->value, sizeof(peer->context)-1);
 332                         }  else if (!strcasecmp(v->name, "bridge")) {
 333                                 peer->bridge = ast_true(v->value);
 334                         } else if (!strcasecmp(v->name, "noFastStart")) {
 335                                 peer->noFastStart = ast_true(v->value);
 336                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
 337                                 peer->noH245Tunneling = ast_true(v->value);
 338                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
 339                                 peer->noSilenceSuppression = ast_true(v->value);
 340                         } else if (!strcasecmp(v->name, "outgoinglimit")) {
 341                                 peer->outgoinglimit = atoi(v->value);
 342                                 if (peer->outgoinglimit > 0)
 343                                         peer->outgoinglimit = 0;
 344                         } else if (!strcasecmp(v->name, "host")) {
 345                                 if (!strcasecmp(v->value, "dynamic")) {
 346                                         ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n");
 347                                         free(peer);
 348                                         return NULL;
 349                                 }
 350                                 if (ast_get_ip(&peer->addr, v->value)) {
 351                                                 free(peer);
 352                                                 return NULL;
 353                                 }
 354                         }
 355                         v=v->next;
 356                 }
 357         }
 358         return peer;
 359 }
 360
 361
 362
 363 /**
 364  * Send (play) the specified digit to the channel.
 365  *
 366  */
 367 static int oh323_digit(struct ast_channel *c, char digit)
 368 {
 369         struct oh323_pvt *p = c->pvt->pvt;
 370         if (p && p->rtp && (p->dtmfmode & H323_DTMF_RFC2833)) {
 371                 ast_rtp_senddigit(p->rtp, digit);
 372         }
 373         /* If in-band DTMF is desired, send that */
 374         if (p->dtmfmode & H323_DTMF_INBAND)
 375                 h323_send_tone(p->cd.call_token, digit);
 376         return 0;
 377 }
 378
 379
 380 /**
 381  * Make a call over the specified channel to the specified
 382  * destination. This function will parse the destination string
 383  * and determine the address-number to call.
 384  * Return -1 on error, 0 on success.
 385  */
 386 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
 387 {
 388         int res;
 389         struct oh323_pvt *p = c->pvt->pvt;
 390         char called_addr[256];
 391         char *tmp;
 392
 393         strtok_r(dest, "/", &(tmp));
 394
 395         ast_log(LOG_DEBUG, "dest=%s, timeout=%d.\n", dest, timeout);
 396
 397         if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
 398                 ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
 399                 return -1;
 400         }
 401
 402         /* outgoing call */
 403         p->outgoing = 1;
 404
 405         /* Clear the call token */
 406         if ((p->cd).call_token == NULL)
 407                 (p->cd).call_token = (char *)malloc(128);
 408
 409         memset((char *)(p->cd).call_token, 0, 128);
 410
 411         if (p->cd.call_token == NULL) {
 412                 ast_log(LOG_ERROR, "Not enough memory.\n");
 413                 return -1;
 414         }
 415
 416         /* Build the address to call */
 417         memset(called_addr, 0, sizeof(dest));
 418         memcpy(called_addr, dest, sizeof(called_addr));
 419
 420         /* Copy callerid, if there is any */
 421         if (c->callerid) {
 422                 char *tmp = strchr(c->callerid, '"');
 423                 if (!tmp) {
 424                         p->calloptions.callerid = malloc(80); // evil
 425                         // sprintf(p->calloptions.callerid, "\"%s\"", c->callerid);
 426                         sprintf(p->calloptions.callerid, "\"\" <%s>", c->callerid);
 427                 } else {
 428                         p->calloptions.callerid = strdup(c->callerid);
 429                 }
 430          }
 431
 432         res = h323_make_call(called_addr, &(p->cd), p->calloptions);
 433
 434         if (res) {
 435                 ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name);
 436                 return -1;
 437         }
 438
 439         ast_setstate(c, AST_STATE_RINGING);
 440         return 0;
 441 }
 442
 443
 444 static int oh323_answer(struct ast_channel *c)
 445 {
 446         int res;
 447
 448         struct oh323_pvt *p = c->pvt->pvt;
 449
 450         res = h323_answering_call(p->cd.call_token, 0);
 451
 452         if (c->_state != AST_STATE_UP)
 453                 ast_setstate(c, AST_STATE_UP);
 454
 455         return res;
 456 }
 457
 458 static int oh323_hangup(struct ast_channel *c)
 459 {
 460         struct oh323_pvt *p = c->pvt->pvt;
 461         int needcancel = 0;
 462         if (h323debug)
 463                 ast_log(LOG_DEBUG, "oh323_hangup(%s)\n", c->name);
 464         if (!c->pvt->pvt) {
 465                 ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n");
 466                 return 0;
 467         }
 468         ast_mutex_lock(&p->lock);
 469         /* Determine how to disconnect */
 470         if (p->owner != c) {
 471                 ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
 472                 ast_mutex_unlock(&p->lock);
 473                 return 0;
 474         }
 475         if (!c || (c->_state != AST_STATE_UP))
 476                 needcancel = 1;
 477         /* Disconnect */
 478         p = c->pvt->pvt;
 479
 480         /* Free dsp used for in-band DTMF detection */
 481         if (p->vad) {
 482                 ast_dsp_free(p->vad);
 483         }
 484
 485         p->owner = NULL;
 486         c->pvt->pvt = NULL;
 487
 488         /* Start the process if it's not already started */
 489         if (!p->alreadygone) {
 490                 p->needdestroy = 1;
 491                 if (h323_clear_call((p->cd).call_token)) {
 492                         ast_log(LOG_DEBUG, "ClearCall failed.\n");
 493                 }
 494         }
 495
 496         /* Update usage counter */
 497         ast_mutex_lock(&usecnt_lock);
 498         usecnt--;
 499         if (usecnt < 0)
 500                 ast_log(LOG_WARNING, "Usecnt < 0\n");
 501         ast_mutex_unlock(&usecnt_lock);
 502         ast_update_use_count();
 503
 504         ast_mutex_unlock(&p->lock);
 505         return 0;
 506 }
 507
 508 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *p)
 509 {
 510         /* Retrieve audio/etc from channel.  Assumes p->lock is already held. */
 511         struct ast_frame *f;
 512         static struct ast_frame null_frame = { AST_FRAME_NULL, };
 513
 514       /* Only apply it for the first packet, we just need the correct ip/port */
 515       if(p->nat)
 516       {
 517               ast_rtp_setnat(p->rtp,p->nat);
 518               p->nat = 0;
 519       }
 520
 521         f = ast_rtp_read(p->rtp);
 522         /* Don't send RFC2833 if we're not supposed to */
 523         if (f && (f->frametype == AST_FRAME_DTMF) && !(p->dtmfmode & H323_DTMF_RFC2833))
 524                 return &null_frame;
 525         if (p->owner) {
 526                 /* We already hold the channel lock */
 527                 if (f->frametype == AST_FRAME_VOICE) {
 528                         if (f->subclass != p->owner->nativeformats) {
 529                                 ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
 530                                 p->owner->nativeformats = f->subclass;
 531                                 ast_set_read_format(p->owner, p->owner->readformat);
 532                                 ast_set_write_format(p->owner, p->owner->writeformat);
 533                         }
 534
 535                         /* Do in-band DTMF detection */
 536                         if (p->dtmfmode & H323_DTMF_INBAND) {
 537                    f = ast_dsp_process(p->owner,p->vad,f,0);
 538                                    if (f->frametype == AST_FRAME_DTMF)
 539                                         ast_log(LOG_DEBUG, "Got in-band digit %c.\n", f->subclass);
 540             }
 541
 542
 543                 }
 544         }
 545         return f;
 546 }
 547
 548
 549 static struct ast_frame  *oh323_read(struct ast_channel *c)
 550 {
 551         struct ast_frame *fr;
 552         struct oh323_pvt *p = c->pvt->pvt;
 553         ast_mutex_lock(&p->lock);
 554         fr = oh323_rtp_read(p);
 555         ast_mutex_unlock(&p->lock);
 556         return fr;
 557 }
 558
 559 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
 560 {
 561         struct oh323_pvt *p = c->pvt->pvt;
 562         int res = 0;
 563         if (frame->frametype != AST_FRAME_VOICE) {
 564                 if (frame->frametype == AST_FRAME_IMAGE)
 565                         return 0;
 566                 else {
 567                         ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
 568                         return 0;
 569                 }
 570         } else {
 571                 if (!(frame->subclass & c->nativeformats)) {
 572                         ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
 573                                 frame->subclass, c->nativeformats, c->readformat, c->writeformat);
 574                         return -1;
 575                 }
 576         }
 577         if (p) {
 578                 ast_mutex_lock(&p->lock);
 579                 if (p->rtp) {
 580                         res =  ast_rtp_write(p->rtp, frame);
 581                 }
 582                 ast_mutex_unlock(&p->lock);
 583         }
 584         return res;
 585 }
 586
 587 /** FIXME: Can I acutally use this or does Open H.323 take care of everything? */
 588 static int oh323_indicate(struct ast_channel *c, int condition)
 589 {
 590
 591         struct oh323_pvt *p = c->pvt->pvt;
 592
 593         switch(condition) {
 594         case AST_CONTROL_RINGING:
 595                 if (c->_state == AST_STATE_RING) {
 596                 //      transmit_response(p, "180 Ringing", &p->initreq);
 597                         break;
 598                 }
 599                 return 0;
 600         case AST_CONTROL_BUSY:
 601                 if (c->_state != AST_STATE_UP) {
 602                 //      transmit_response(p, "600 Busy everywhere", &p->initreq);
 603                         p->alreadygone = 1;
 604                         ast_softhangup(c, AST_SOFTHANGUP_DEV);
 605                         break;
 606                 }
 607                 return 0;
 608         case AST_CONTROL_CONGESTION:
 609                 if (c->_state != AST_STATE_UP) {
 610                 //      transmit_response(p, "486 Busy here", &p->initreq);
 611                         p->alreadygone = 1;
 612                         ast_softhangup(c, AST_SOFTHANGUP_DEV);
 613                         break;
 614                 }
 615                 return 0;
 616         case -1:
 617                 return -1;
 618         default:
 619                 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition);
 620                 return -1;
 621         }
 622         return 0;
 623 }
 624
 625 // FIXME: WTF is this? Do I need this???
 626 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
 627 {
 628         struct oh323_pvt *p = newchan->pvt->pvt;
 629
 630         ast_mutex_lock(&p->lock);
 631         if (p->owner != oldchan) {
 632                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, p->owner);
 633                 return -1;
 634         }
 635         p->owner = newchan;
 636         ast_mutex_unlock(&p->lock);
 637         return 0;
 638 }
 639
 640 static struct ast_channel *oh323_new(struct oh323_pvt *i, int state, const char *host)
 641 {
 642         struct ast_channel *ch;
 643         int fmt;
 644         ch = ast_channel_alloc(1);
 645
 646         if (ch) {
 647
 648                 snprintf(ch->name, sizeof(ch->name)-1, "H323/%s", host);
 649                 ch->nativeformats = i->capability;
 650                 if (!ch->nativeformats)
 651                         ch->nativeformats = capability;
 652                 fmt = ast_best_codec(ch->nativeformats);
 653                 ch->type = type;
 654                 ch->fds[0] = ast_rtp_fd(i->rtp);
 655                 ast_setstate(ch, state);
 656
 657                 if (state == AST_STATE_RING)
 658                         ch->rings = 1;
 659
 660                 ch->writeformat = fmt;
 661                 ch->pvt->rawwriteformat = fmt;
 662                 ch->readformat = fmt;
 663                 ch->pvt->rawreadformat = fmt;
 664
 665                 /* Allocate dsp for in-band DTMF support */
 666                 if (i->dtmfmode & H323_DTMF_INBAND) {
 667                         i->vad = ast_dsp_new();
 668                         ast_dsp_set_features(i->vad, DSP_FEATURE_DTMF_DETECT);
 669                 }
 670
 671                 /* Register the OpenH323 channel's functions. */
 672                 ch->pvt->pvt = i;
 673                 ch->pvt->send_digit = oh323_digit;
 674                 ch->pvt->call = oh323_call;
 675                 ch->pvt->hangup = oh323_hangup;
 676                 ch->pvt->answer = oh323_answer;
 677                 ch->pvt->read = oh323_read;
 678                 ch->pvt->write = oh323_write;
 679                 ch->pvt->indicate = oh323_indicate;
 680                 ch->pvt->fixup = oh323_fixup;
 681 //              ch->pvt->bridge = ast_rtp_bridge;
 682
 683                 /*  Set the owner of this channel */
 684                 i->owner = ch;
 685
 686                 ast_mutex_lock(&usecnt_lock);
 687                 usecnt++;
 688                 ast_mutex_unlock(&usecnt_lock);
 689                 ast_update_use_count();
 690                 strncpy(ch->context, i->context, sizeof(ch->context)-1);
 691                 strncpy(ch->exten, i->exten, sizeof(ch->exten)-1);
 692                 ch->priority = 1;
 693                 if (strlen(i->callerid))
 694                         ch->callerid = strdup(i->callerid);
 695                 if (strlen(i->accountcode))
 696                         strncpy(ch->accountcode, i->accountcode, sizeof(ch->accountcode)-1);
 697                 if (i->amaflags)
 698                         ch->amaflags = i->amaflags;
 699                 if (state != AST_STATE_DOWN) {
 700                         if (ast_pbx_start(ch)) {
 701                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
 702                                 ast_hangup(ch);
 703                                 ch = NULL;
 704                         }
 705                 }
 706         } else
 707                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
 708         return ch;
 709 }
 710
 711 static struct oh323_pvt *oh323_alloc(int callid)
 712 {
 713         struct oh323_pvt *p;
 714
 715         p = malloc(sizeof(struct oh323_pvt));
 716         if (!p) {
 717                 ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
 718                 return NULL;
 719         }
 720
 721         /* Keep track of stuff */
 722         memset(p, 0, sizeof(struct oh323_pvt));
 723         p->rtp = ast_rtp_new(sched, io, 1, 0);
 724
 725         if (!p->rtp) {
 726                 ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
 727                 free(p);
 728                 return NULL;
 729         }
 730         ast_rtp_settos(p->rtp, tos);
 731         ast_mutex_init(&p->lock);
 732
 733         p->cd.call_reference = callid;
 734         p->bridge = bridge_default;
 735
 736         p->dtmfmode = dtmfmode;
 737         if (p->dtmfmode & H323_DTMF_RFC2833)
 738                 p->nonCodecCapability |= AST_RTP_DTMF;
 739
 740         /* Add to interface list */
 741         ast_mutex_lock(&iflock);
 742         p->next = iflist;
 743         iflist = p;
 744         ast_mutex_unlock(&iflock);
 745         return p;
 746 }
 747
 748 static struct oh323_pvt *find_call(int call_reference)
 749 {
 750         struct oh323_pvt *p;
 751
 752                 ast_mutex_lock(&iflock);
 753         p = iflist;
 754
 755         while(p) {
 756                 if (p->cd.call_reference == call_reference) {
 757                         /* Found the call */
 758                                                 ast_mutex_unlock(&iflock);
 759                                                 return p;
 760                 }
 761                 p = p->next;
 762         }
 763         ast_mutex_unlock(&iflock);
 764                 return NULL;
 765
 766 }
 767
 768 static struct ast_channel *oh323_request(char *type, int format, void *data)
 769 {
 770
 771         int oldformat;
 772         struct oh323_pvt *p;
 773         struct ast_channel *tmpc = NULL;
 774         char *dest = data;
 775         char *ext, *host;
 776         char *h323id = NULL;
 777         char tmp[256];
 778
 779
 780         ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
 781
 782         oldformat = format;
 783         format &= capability;
 784         if (!format) {
 785                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
 786                 return NULL;
 787         }
 788
 789         strncpy(tmp, dest, sizeof(tmp) - 1);
 790
 791         host = strchr(tmp, '@');
 792         if (host) {
 793                 *host = '\0';
 794                 host++;
 795                 ext = tmp;
 796         } else {
 797                 host = tmp;
 798                 ext = NULL;
 799         }
 800
 801         strtok_r(host, "/", &(h323id));
 802
 803         if (*h323id) {
 804                 h323_set_id(h323id);
 805         }
 806
 807
 808         p = oh323_alloc(0);
 809
 810         if (!p) {
 811                 ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
 812                 return NULL;
 813         }
 814
 815         /* Assign a default capability */
 816         p->capability = capability;
 817
 818         if (p->dtmfmode) {
 819                 if (p->dtmfmode & H323_DTMF_RFC2833)
 820                         p->nonCodecCapability |= AST_RTP_DTMF;
 821                 else
 822                         p->nonCodecCapability &= ~AST_RTP_DTMF;
 823         }
 824
 825
 826         ast_log(LOG_DEBUG, "Host: %s\tUsername: %s\n", host, p->username);
 827
 828         if (ext)
 829                 strncpy(p->username, ext, sizeof(p->username) - 1);
 830         tmpc = oh323_new(p, AST_STATE_DOWN, host);
 831         if (!tmpc)
 832                 oh323_destroy(p);
 833
 834         restart_monitor();
 835
 836         return tmpc;
 837 }
 838
 839 struct oh323_alias *find_alias(const char *source_aliases)
 840 {
 841         struct oh323_alias *a;
 842
 843         a = aliasl.aliases;
 844
 845         while(a) {
 846
 847                 if (!strcasecmp(a->name, source_aliases)) {
 848                         break;
 849                 }
 850                 a = a->next;
 851         }
 852         return a;
 853 }
 854
 855 struct oh323_user *find_user(const call_details_t cd)
 856 {
 857         struct oh323_user *u;
 858
 859         u = userl.users;
 860         if(userbyalias == 1){
 861                 while(u) {
 862                         if (!strcasecmp(u->name, cd.call_source_aliases)) {
 863                                 break;
 864                         }
 865                         u = u->next;
 866                 }
 867
 868         } else {
 869                 while(u) {
 870                         if (!strcasecmp(cd.sourceIp, inet_ntoa(u->addr.sin_addr))) {
 871                                 break;
 872                         }
 873                         u = u->next;
 874                 }
 875
 876
 877         }
 878         return u;
 879
 880 }
 881
 882 struct oh323_peer *find_peer(char *dest_peer)
 883 {
 884         struct oh323_peer *p;
 885
 886         p = peerl.peers;
 887
 888         while(p) {
 889                 if (!strcasecmp(p->name, dest_peer)) {
 890                         break;
 891                 }
 892                 p = p->next;
 893         }
 894         return p;
 895
 896 }
 897
 898 /**
 899   * Callback for sending digits from H.323 up to asterisk
 900   *
 901   */
 902 int send_digit(unsigned call_reference, char digit)
 903 {
 904         struct oh323_pvt *p;
 905         struct ast_frame f;
 906
 907         ast_log(LOG_DEBUG, "Recieved Digit: %c\n", digit);
 908         p = find_call(call_reference);
 909
 910         if (!p) {
 911                 ast_log(LOG_ERROR, "Private structure not found in send_digit.\n");
 912                 return -1;
 913         }
 914         memset(&f, 0, sizeof(f));
 915         f.frametype = AST_FRAME_DTMF;
 916     f.subclass = digit;
 917     f.datalen = 0;
 918     f.samples = 300;
 919         f.offset = 0;
 920         f.data = NULL;
 921     f.mallocd = 0;
 922     f.src = "SEND_DIGIT";
 923
 924         return ast_queue_frame(p->owner, &f, 1);
 925 }
 926
 927 /**
 928   * Call-back function that gets called when any H.323 connection is made
 929   *
 930   * Returns the local RTP information
 931   */
 932 struct rtp_info *create_connection(unsigned call_reference)
 933 {
 934         struct oh323_pvt *p;
 935         struct sockaddr_in us;
 936         struct sockaddr_in them;
 937         struct rtp_info *info;
 938
 939         info = malloc(sizeof(struct rtp_info));
 940
 941         p = find_call(call_reference);
 942
 943         if (!p) {
 944                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is very bad.\n");
 945                 return NULL;
 946         }
 947
 948         /* figure out our local RTP port and tell the H.323 stack about it*/
 949         ast_rtp_get_us(p->rtp, &us);
 950         ast_rtp_get_peer(p->rtp, &them);
 951
 952
 953         info->addr = inet_ntoa(us.sin_addr);
 954         info->port = ntohs(us.sin_port);
 955
 956
 957         return info;
 958 }
 959
 960 /**
 961  *  Call-back function for incoming calls
 962  *
 963  *  Returns 1 on success
 964  */
 965
 966 int setup_incoming_call(call_details_t cd)
 967 {
 968
 969         struct oh323_pvt *p = NULL;
 970         struct ast_channel *c = NULL;
 971         struct oh323_user *user = NULL;
 972         struct oh323_alias *alias = NULL;
 973
 974         /* allocate the call*/
 975         p = oh323_alloc(cd.call_reference);
 976
 977         if (!p) {
 978                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
 979                 return 0;
 980         }
 981
 982         /* Populate the call details in the private structure */
 983         p->cd.call_token = cd.call_token;
 984         p->cd.call_source_aliases = cd.call_source_aliases;
 985         p->cd.call_dest_alias = cd.call_dest_alias;
 986         p->cd.call_source_e164 = cd.call_source_e164;
 987         p->cd.call_dest_e164 = cd.call_dest_e164;
 988
 989         if (h323debug) {
 990                 ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n");
 991                 ast_verbose(VERBOSE_PREFIX_3 "     Call token:  [%s]\n", p->cd.call_token);
 992                 ast_verbose(VERBOSE_PREFIX_3 "     Calling party name:  [%s]\n", p->cd.call_source_aliases);
 993                 ast_verbose(VERBOSE_PREFIX_3 "     Calling party number:  [%s]\n", p->cd.call_source_e164);
 994                 ast_verbose(VERBOSE_PREFIX_3 "     Called  party name:  [%s]\n", p->cd.call_dest_alias);
 995                 ast_verbose(VERBOSE_PREFIX_3 "     Called  party number:  [%s]\n", p->cd.call_dest_e164);
 996         }
 997
 998         /* Decide if we are allowing Gatekeeper routed calls*/
 999         if ((!strcasecmp(cd.sourceIp, gatekeeper)) && (gkroute == -1) && (usingGk == 1)) {
1000
1001                 if (strlen(cd.call_dest_e164)) {
1002                         strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
1003                         strncpy(p->context, default_context, sizeof(p->context)-1);
1004                 } else {
1005                         alias = find_alias(cd.call_dest_alias);
1006
1007                         if (!alias) {
1008                                 ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd.call_dest_alias);
1009                                 return 0;
1010                         }
1011                         strncpy(p->exten, alias->name, sizeof(p->exten)-1);
1012                         strncpy(p->context, alias->context, sizeof(p->context)-1);
1013                 }
1014
1015
1016                 sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164);
1017
1018         } else {
1019                 /* Either this call is not from the Gatekeeper
1020                    or we are not allowing gk routed calls */
1021
1022
1023                 user  = find_user(cd);
1024
1025
1026                 if (!user) {
1027                         sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164);
1028                         if (strlen(p->cd.call_dest_e164)) {
1029                                 strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
1030                         } else {
1031                                 strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1);
1032                         }
1033                         if (!strlen(default_context)) {
1034                                 ast_log(LOG_ERROR, "Call from user '%s' rejected due to no default context\n", p->cd.call_source_aliases);
1035                                 return 0;
1036                         }
1037                         strncpy(p->context, default_context, sizeof(p->context)-1);
1038                         ast_log(LOG_DEBUG, "Sending %s to context [%s]\n", cd.call_source_aliases, p->context);
1039                 } else {
1040                         if (user->host) {
1041                                 if (strcasecmp(cd.sourceIp, inet_ntoa(user->addr.sin_addr))){
1042
1043                                         if(!strlen(default_context)) {
1044                                                 ast_log(LOG_ERROR, "Call from user '%s' rejected due to non-matching IP address of '%s'\n", user->name, cd.sourceIp);
1045                                                 return 0;
1046                                         }
1047
1048                                         strncpy(p->context, default_context, sizeof(p->context)-1);
1049                                         sprintf(p->exten,"i");
1050
1051                                         goto exit;
1052                                 }
1053                         }
1054                         if (user->incominglimit > 0) {
1055                                 if (user->inUse >= user->incominglimit) {
1056                                         ast_log(LOG_ERROR, "Call from user '%s' rejected due to usage limit of %d\n", user->name, user->incominglimit);
1057                                         return 0;
1058                                 }
1059                         }
1060                         strncpy(p->context, user->context, sizeof(p->context)-1);
1061                         p->bridge = user->bridge;
1062                       p->nat = user->nat;
1063
1064                         if (strlen(user->callerid))
1065                                 strncpy(p->callerid, user->callerid, sizeof(p->callerid) - 1);
1066                         else
1067                                 sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164);
1068
1069                         if (strlen(p->cd.call_dest_e164)) {
1070                                 strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
1071                         } else {
1072                                 strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1);
1073                         }
1074                         if (strlen(user->accountcode)) {
1075                                 strncpy(p->accountcode, user->accountcode, sizeof(p->accountcode)-1);
1076                         }
1077
1078                         /* Increment the usage counter */
1079                         user->inUse++;
1080                 }
1081         }
1082
1083 /* I know this is horrid, don't kill me saddam */
1084 exit:
1085         /* allocate a channel and tell asterisk about it */
1086         c = oh323_new(p, AST_STATE_RINGING, cd.call_token);
1087         if (!c) {
1088                 ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
1089                 return 0;
1090         }
1091
1092         return 1;
1093 }
1094
1095 /**
1096  * Call-back function to establish an outgoing H.323 call
1097  *
1098  * Returns 1 on success
1099  */
1100 int setup_outgoing_call(call_details_t cd)
1101 {
1102         return 1;
1103 }
1104
1105 #if 0
1106 if (p->inUse >= p->outgoinglimit) {
1107         ast_log(LOG_ERROR, "Call to %s rejected due to usage limit of %d outgoing channels\n", p->name, p->inUse);
1108         return 0;
1109 }
1110
1111 if (!p) {
1112         ast_log(LOG_ERROR, "Rejecting call: peer %s not found\n", dest_peer);
1113         return 0;
1114 }
1115 #endif
1116
1117 /**
1118   * Call-back function that gets called for each rtp channel opened
1119   *
1120   * Returns nothing
1121   */
1122 void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort)
1123 {
1124         struct oh323_pvt *p = NULL;
1125         struct sockaddr_in them;
1126
1127         /* Find the call or allocate a private structure if call not found */
1128         p = find_call(call_reference);
1129
1130         if (!p) {
1131                 ast_log(LOG_ERROR, "Something is wrong: rtp\n");
1132                 return;
1133         }
1134
1135         them.sin_family = AF_INET;
1136         them.sin_addr.s_addr = inet_addr(remoteIp); // only works for IPv4
1137         them.sin_port = htons(remotePort);
1138         ast_rtp_set_peer(p->rtp, &them);
1139
1140         return;
1141 }
1142
1143 /**
1144   *     Call-back function to signal asterisk that the channel has been answered
1145   * Returns nothing
1146   */
1147 void connection_made(unsigned call_reference)
1148 {
1149         struct ast_channel *c = NULL;
1150         struct oh323_pvt *p = NULL;
1151
1152         p = find_call(call_reference);
1153
1154         if (!p)
1155                 ast_log(LOG_ERROR, "Something is wrong: connection\n");
1156
1157
1158         if (!p->owner) {
1159                 ast_log(LOG_ERROR, "Channel has no owner\n");
1160                 return;
1161         }
1162         c = p->owner;
1163
1164         ast_setstate(c, AST_STATE_UP);
1165         return;
1166 }
1167
1168 /**
1169   * Call-back function to cleanup communication
1170   * Returns nothing,
1171   */
1172 void cleanup_connection(call_details_t cd)
1173 {
1174         struct oh323_pvt *p = NULL;
1175 //      struct oh323_peer *peer = NULL;
1176         struct oh323_user *user = NULL;
1177         struct ast_rtp *rtp = NULL;
1178
1179         ast_log(LOG_DEBUG, "Cleaning up our mess\n");
1180
1181         p = find_call(cd.call_reference);
1182
1183         if (!p) {
1184                 return;
1185         }
1186
1187         /* Decrement usage counter */
1188         if (!p->outgoing) {
1189                 user = find_user(cd);
1190
1191                 if(user)
1192                         user->inUse--;
1193         }
1194
1195 #if 0
1196                 if (p->outgoing) {
1197                 peer = find_peer(cd.call_dest_alias);
1198                 peer->inUse--;
1199         } else {
1200                 user = find_user(cd);
1201                 user->inUse--;
1202         }
1203 #endif
1204
1205         if (p->rtp) {
1206                 rtp = p->rtp;
1207                 p->rtp = NULL;
1208                 /* Immediately stop RTP */
1209                 ast_rtp_destroy(rtp);
1210         }
1211
1212         p->alreadygone = 1;
1213
1214         /* Send hangup */
1215         if (p->owner)
1216                 ast_queue_hangup(p->owner, 1);
1217
1218         p = NULL;
1219         return;
1220 }
1221
1222 static void *do_monitor(void *data)
1223 {
1224         int res;
1225         struct oh323_pvt *oh323 = NULL;
1226
1227                 for(;;) {
1228                 /* Check for interfaces needing to be killed */
1229                 ast_mutex_lock(&iflock);
1230 restartsearch:
1231                 oh323 = iflist;
1232                 while(oh323) {
1233                         if (oh323->needdestroy) {
1234                                 __oh323_destroy(oh323);
1235                                 goto restartsearch;
1236                         }
1237                         oh323 = oh323->next;
1238                 }
1239                 ast_mutex_unlock(&iflock);
1240
1241                 /* Wait for sched or io */
1242                 res = ast_sched_wait(sched);
1243                 if ((res < 0) || (res > 1000))
1244                         res = 1000;
1245                 res = ast_io_wait(io, res);
1246
1247                 pthread_testcancel();
1248
1249                 ast_mutex_lock(&monlock);
1250                 if (res >= 0)
1251                         ast_sched_runq(sched);
1252                 ast_mutex_unlock(&monlock);
1253         }
1254         /* Never reached */
1255         return NULL;
1256
1257 }
1258
1259 static int restart_monitor(void)
1260 {
1261         /* If we're supposed to be stopped -- stay stopped */
1262         if (monitor_thread == -2)
1263                 return 0;
1264         if (ast_mutex_lock(&monlock)) {
1265                 ast_log(LOG_WARNING, "Unable to lock monitor\n");
1266                 return -1;
1267         }
1268         if (monitor_thread == pthread_self()) {
1269                 ast_mutex_unlock(&monlock);
1270                 ast_log(LOG_WARNING, "Cannot kill myself\n");
1271                 return -1;
1272         }
1273         if (monitor_thread) {
1274                 /* Wake up the thread */
1275                 pthread_kill(monitor_thread, SIGURG);
1276         } else {
1277                 /* Start a new monitor */
1278                 if (pthread_create(&monitor_thread, NULL, do_monitor, NULL) < 0) {
1279                         ast_mutex_unlock(&monlock);
1280                         ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
1281                         return -1;
1282                 }
1283         }
1284         ast_mutex_unlock(&monlock);
1285         return 0;
1286 }
1287
1288 static int h323_do_trace(int fd, int argc, char *argv[])
1289 {
1290         if (argc != 3)
1291                 return RESULT_SHOWUSAGE;
1292
1293         h323_debug(1, atoi(argv[2]));
1294         ast_cli(fd, "H.323 trace set to level %s\n", argv[2]);
1295         return RESULT_SUCCESS;
1296 }
1297
1298 static int h323_no_trace(int fd, int argc, char *argv[])
1299 {
1300         if (argc != 3)
1301                 return RESULT_SHOWUSAGE;
1302
1303         h323_debug(0,0);
1304         ast_cli(fd, "H.323 trace disabled\n");
1305         return RESULT_SUCCESS;
1306 }
1307
1308 static int h323_do_debug(int fd, int argc, char *argv[])
1309 {
1310         if (argc != 2)
1311                 return RESULT_SHOWUSAGE;
1312
1313         h323debug = 1;
1314         ast_cli(fd, "H323 debug enabled\n");
1315         return RESULT_SUCCESS;
1316 }
1317
1318 static int h323_no_debug(int fd, int argc, char *argv[])
1319 {
1320         if (argc != 3)
1321                 return RESULT_SHOWUSAGE;
1322
1323         h323debug = 0;
1324         ast_cli(fd, "H323 Debug disabled\n");
1325         return RESULT_SUCCESS;
1326 }
1327
1328 static int h323_gk_cycle(int fd, int argc, char *argv[])
1329 {
1330         if (argc != 3)
1331                 return RESULT_SHOWUSAGE;
1332
1333         h323_gk_urq();
1334
1335         /* Possibly register with a GK */
1336         if (gatekeeper_disable == 0) {
1337                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1338                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1339                         h323_end_process();
1340                 }
1341         }
1342
1343         return RESULT_SUCCESS;
1344 }
1345
1346 static int h323_ep_hangup(int fd, int argc, char *argv[])
1347 {
1348
1349         if (argc != 3)
1350                 return RESULT_SHOWUSAGE;
1351
1352         if (h323_soft_hangup(argv[2])) {
1353                 ast_verbose(VERBOSE_PREFIX_3 "Hangup succeeded on %s\n", argv[2]);
1354         } else {
1355                 ast_verbose(VERBOSE_PREFIX_3 "Hangup failed for %s\n", argv[2]);
1356         }
1357
1358         return RESULT_SUCCESS;
1359 }
1360
1361 static int h323_tokens_show(int fd, int argc, char *argv[])
1362 {
1363
1364         if (argc != 3)
1365                 return RESULT_SHOWUSAGE;
1366
1367         h323_show_tokens();
1368
1369         return RESULT_SUCCESS;
1370 }
1371
1372
1373 static char trace_usage[] =
1374 "Usage: h.323 trace <level num>\n"
1375 "       Enables H.323 stack tracing for debugging purposes\n";
1376
1377 static char no_trace_usage[] =
1378 "Usage: h.323 no trace\n"
1379 "       Disables H.323 stack tracing for debugging purposes\n";
1380
1381 static char debug_usage[] =
1382 "Usage: h.323 debug\n"
1383 "       Enables chan_h323 debug output\n";
1384
1385 static char no_debug_usage[] =
1386 "Usage: h.323 no debug\n"
1387 "       Disables chan_h323 debug output\n";
1388
1389 static char show_codec_usage[] =
1390 "Usage: h.323 show codec\n"
1391 "       Shows all enabled codecs\n";
1392
1393 static char show_cycle_usage[] =
1394 "Usage: h.323 gk cycle\n"
1395 "       Manually re-register with the Gatekeper\n";
1396
1397 static char show_hangup_usage[] =
1398 "Usage: h.323 hangup <token>\n"
1399 "       Manually try to hang up call identified by <token>\n";
1400
1401 static char show_tokens_usage[] =
1402 "Usage: h.323 show tokens\n"
1403 "       Print out all active call tokens\n";
1404
1405 static struct ast_cli_entry  cli_trace =
1406         { { "h.323", "trace", NULL }, h323_do_trace, "Enable H.323 Stack Tracing", trace_usage };
1407 static struct ast_cli_entry  cli_no_trace =
1408         { { "h.323", "no", "trace", NULL }, h323_no_trace, "Disable H.323 Stack Tracing", no_trace_usage };
1409 static struct ast_cli_entry  cli_debug =
1410         { { "h.323", "debug", NULL }, h323_do_debug, "Enable chan_h323 debug", debug_usage };
1411 static struct ast_cli_entry  cli_no_debug =
1412         { { "h.323", "no", "debug", NULL }, h323_no_debug, "Disable chan_h323 debug", no_debug_usage };
1413 static struct ast_cli_entry  cli_show_codecs =
1414         { { "h.323", "show", "codecs", NULL }, h323_show_codec, "Show enabled codecs", show_codec_usage };
1415 static struct ast_cli_entry  cli_gk_cycle =
1416         { { "h.323", "gk", "cycle", NULL }, h323_gk_cycle, "Manually re-register with the Gatekeper", show_cycle_usage };
1417 static struct ast_cli_entry  cli_hangup_call =
1418         { { "h.323", "hangup", NULL }, h323_ep_hangup, "Manually try to hang up a call", show_hangup_usage };
1419 static struct ast_cli_entry  cli_show_tokens =
1420         { { "h.323", "show", "tokens", NULL }, h323_tokens_show, "Manually try to hang up a call", show_tokens_usage };
1421
1422
1423
1424 int reload_config(void)
1425 {
1426
1427         int format;
1428         struct ast_config *cfg;
1429         struct ast_variable *v;
1430         struct oh323_peer *peer   = NULL;
1431         struct oh323_user *user   = NULL;
1432         struct oh323_alias *alias = NULL;
1433         struct hostent *hp;
1434         char *cat;
1435     char *utype;
1436
1437         cfg = ast_load(config);
1438
1439         /* We *must* have a config file otherwise stop immediately */
1440         if (!cfg) {
1441                 ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
1442                 return 1;
1443         }
1444
1445        /* fire up the H.323 Endpoint */
1446         if (!h323_end_point_exist()) {
1447                h323_end_point_create();
1448         }
1449         h323debug=0;
1450         dtmfmode = H323_DTMF_RFC2833;
1451
1452         memset(&bindaddr, 0, sizeof(bindaddr));
1453
1454         v = ast_variable_browse(cfg, "general");
1455         while(v) {
1456                 /* Create the interface list */
1457                 if (!strcasecmp(v->name, "port")) {
1458                         port = (int)strtol(v->value, NULL, 10);
1459                 } else if (!strcasecmp(v->name, "bindaddr")) {
1460                         if (!(hp = gethostbyname(v->value))) {
1461                                 ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
1462                         } else {
1463                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
1464                         }
1465                 } else if (!strcasecmp(v->name, "allow")) {
1466                         format = ast_getformatbyname(v->value);
1467                         if (format < 1)
1468                                 ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value);
1469                         else
1470                                 capability |= format;
1471                 } else if (!strcasecmp(v->name, "disallow")) {
1472                         format = ast_getformatbyname(v->value);
1473                         if (format < 1)
1474                                 ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value);
1475                         else
1476                                 capability &= ~format;
1477                 } else if (!strcasecmp(v->name, "tos")) {
1478                         if (sscanf(v->value, "%i", &format) == 1)
1479                                 tos = format & 0xff;
1480                         else if (!strcasecmp(v->value, "lowdelay"))
1481                                 tos = IPTOS_LOWDELAY;
1482                         else if (!strcasecmp(v->value, "throughput"))
1483                                 tos = IPTOS_THROUGHPUT;
1484                         else if (!strcasecmp(v->value, "reliability"))
1485                                 tos = IPTOS_RELIABILITY;
1486                         else if (!strcasecmp(v->value, "mincost"))
1487                                 tos = IPTOS_MINCOST;
1488                         else if (!strcasecmp(v->value, "none"))
1489                                 tos = 0;
1490                         else
1491                                 ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno);
1492                 } else if (!strcasecmp(v->name, "gatekeeper")) {
1493                         if (!strcasecmp(v->value, "DISABLE")) {
1494                                 gatekeeper_disable = 1;
1495                                 usingGk = 0;
1496                         } else if (!strcasecmp(v->value, "DISCOVER")) {
1497                                 gatekeeper_disable = 0;
1498                                 gatekeeper_discover = 1;
1499                                 usingGk = 1;
1500                         } else {
1501                                 gatekeeper_disable = 0;
1502                                 usingGk = 1;
1503                                 strncpy(gatekeeper, v->value, sizeof(gatekeeper)-1);
1504                         }
1505                 } else if (!strcasecmp(v->name, "secret")) {
1506                                 strncpy(secret, v->value, sizeof(secret)-1);
1507                 } else if (!strcasecmp(v->name, "AllowGKRouted")) {
1508                                 gkroute = ast_true(v->value);
1509                 } else if (!strcasecmp(v->name, "context")) {
1510                         strncpy(default_context, v->value, sizeof(default_context)-1);
1511                         ast_verbose(VERBOSE_PREFIX_3 "  == Setting default context to %s\n", default_context);
1512                 } else if (!strcasecmp(v->name, "dtmfmode")) {
1513                         if (!strcasecmp(v->value, "inband"))
1514                                 dtmfmode=H323_DTMF_INBAND;
1515                         else if (!strcasecmp(v->value, "rfc2833"))
1516                                 dtmfmode = H323_DTMF_RFC2833;
1517                         else {
1518                                 ast_log(LOG_WARNING, "Unknown dtmf mode '%s', using rfc2833\n", v->value);
1519                                 dtmfmode = H323_DTMF_RFC2833;
1520                         }
1521                 } else if (!strcasecmp(v->name, "UserByAlias")) {
1522                         userbyalias = ast_true(v->value);
1523                 } else if (!strcasecmp(v->name, "bridge")) {
1524                         bridge_default = ast_true(v->value);
1525                 }
1526                 v = v->next;
1527         }
1528
1529         cat = ast_category_browse(cfg, NULL);
1530         while(cat) {
1531                 if (strcasecmp(cat, "general")) {
1532                         utype = ast_variable_retrieve(cfg, cat, "type");
1533                         if (utype) {
1534                                 if (!strcasecmp(utype, "user") || !strcasecmp(utype, "friend")) {
1535                                         user = build_user(cat, ast_variable_browse(cfg, cat));
1536                                         if (user) {
1537                                                 ast_mutex_lock(&userl.lock);
1538                                                 user->next = userl.users;
1539                                                 userl.users = user;
1540                                                 ast_mutex_unlock(&userl.lock);
1541                                         }
1542                                 }  else if (!strcasecmp(utype, "peer") || !strcasecmp(utype, "friend")) {
1543                                         peer = build_peer(cat, ast_variable_browse(cfg, cat));
1544                                         if (peer) {
1545                                                 ast_mutex_lock(&peerl.lock);
1546                                                 peer->next = peerl.peers;
1547                                                 peerl.peers = peer;
1548                                                 ast_mutex_unlock(&peerl.lock);
1549                                         }
1550                                 }  else if (!strcasecmp(utype, "h323")) {
1551                                         alias = build_alias(cat, ast_variable_browse(cfg, cat));
1552                                         if (alias) {
1553                                                 ast_mutex_lock(&aliasl.lock);
1554                                                 alias->next = aliasl.aliases;
1555                                                 aliasl.aliases = alias;
1556                                                 ast_mutex_unlock(&aliasl.lock);
1557                                         }
1558                                 } else {
1559                                         ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
1560                                 }
1561                         } else
1562                                 ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
1563                 }
1564                 cat = ast_category_browse(cfg, cat);
1565         }
1566
1567         /* Register our H.323 aliases if any*/
1568         while (alias) {
1569                 if (h323_set_alias(alias)) {
1570                         ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
1571                         return -1;
1572                 }
1573                 alias = alias->next;
1574         }
1575
1576         /* Add some capabilities */
1577         if(h323_set_capability(capability, dtmfmode)) {
1578                 ast_log(LOG_ERROR, "Capabilities failure, this is bad.\n");
1579                 return -1;
1580         }
1581         ast_destroy(cfg);
1582
1583         return 0;
1584 }
1585
1586 void delete_users(void)
1587 {
1588         struct oh323_user *user, *userlast;
1589         struct oh323_peer *peer;
1590
1591         /* Delete all users */
1592         ast_mutex_lock(&userl.lock);
1593         for (user=userl.users;user;) {
1594                 userlast = user;
1595                 user=user->next;
1596                 free(userlast);
1597         }
1598         userl.users=NULL;
1599         ast_mutex_unlock(&userl.lock);
1600         ast_mutex_lock(&peerl.lock);
1601         for (peer=peerl.peers;peer;) {
1602                 /* Assume all will be deleted, and we'll find out for sure later */
1603                 peer->delme = 1;
1604                 peer = peer->next;
1605         }
1606         ast_mutex_unlock(&peerl.lock);
1607 }
1608
1609 void delete_aliases(void)
1610 {
1611         struct oh323_alias *alias, *aliaslast;
1612
1613         /* Delete all users */
1614         ast_mutex_lock(&aliasl.lock);
1615         for (alias=aliasl.aliases;alias;) {
1616                 aliaslast = alias;
1617                 alias=alias->next;
1618                 free(aliaslast);
1619         }
1620         aliasl.aliases=NULL;
1621         ast_mutex_unlock(&aliasl.lock);
1622 }
1623
1624 void prune_peers(void)
1625 {
1626         /* Prune peers who still are supposed to be deleted */
1627         struct oh323_peer *peer, *peerlast, *peernext;
1628         ast_mutex_lock(&peerl.lock);
1629         peerlast = NULL;
1630         for (peer=peerl.peers;peer;) {
1631                 peernext = peer->next;
1632                 if (peer->delme) {
1633                         free(peer);
1634                         if (peerlast)
1635                                 peerlast->next = peernext;
1636                         else
1637                                 peerl.peers = peernext;
1638                 } else
1639                         peerlast = peer;
1640                 peer=peernext;
1641         }
1642         ast_mutex_unlock(&peerl.lock);
1643 }
1644
1645 int reload(void)
1646 {
1647         delete_users();
1648         delete_aliases();
1649         prune_peers();
1650
1651 #if 0
1652         if (strlen(gatekeeper)) {
1653                 h323_gk_urq();
1654         }
1655 #endif
1656
1657         reload_config();
1658
1659 #if 0
1660         /* Possibly register with a GK */
1661         if (gatekeeper_disable == 0) {
1662                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1663                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1664                         h323_end_process();
1665                         return -1;
1666                 }
1667         }
1668 #endif
1669         restart_monitor();
1670         return 0;
1671 }
1672
1673
1674 static struct ast_rtp *oh323_get_rtp_peer(struct ast_channel *chan)
1675 {
1676         struct oh323_pvt *p;
1677         p = chan->pvt->pvt;
1678         if (p && p->rtp && p->bridge) {
1679                 return p->rtp;
1680         }
1681         return NULL;
1682 }
1683
1684 static struct ast_rtp *oh323_get_vrtp_peer(struct ast_channel *chan)
1685 {
1686         return NULL;
1687 }
1688
1689 static char *convertcap(int cap)
1690 {
1691         switch (cap) {
1692         case AST_FORMAT_G723_1:
1693                 return "G.723";
1694         case AST_FORMAT_GSM:
1695                 return "GSM";
1696         case AST_FORMAT_ULAW:
1697                 return "ULAW";
1698         case AST_FORMAT_ALAW:
1699                 return "ALAW";
1700         case AST_FORMAT_ADPCM:
1701                 return "G.728";
1702         case AST_FORMAT_G729A:
1703                 return "G.729";
1704         case AST_FORMAT_SPEEX:
1705                 return "SPEEX";
1706         case AST_FORMAT_ILBC:
1707                 return "ILBC";
1708         default:
1709                 ast_log(LOG_NOTICE, "Don't know how to deal with mode %d\n", cap);
1710                 return NULL;
1711         }
1712
1713 }
1714
1715 static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp)
1716 {
1717         /* XXX Deal with Video */
1718         struct oh323_pvt *p;
1719         struct sockaddr_in them;
1720         struct sockaddr_in us;
1721         char *mode;
1722
1723         mode = convertcap(chan->writeformat);
1724
1725         if (!rtp) {
1726                 return 0;
1727         }
1728
1729         p = chan->pvt->pvt;
1730         if (!p) {
1731                 ast_log(LOG_ERROR, "No Private Structure, this is bad\n");
1732                 return -1;
1733         }
1734
1735         ast_rtp_get_peer(rtp, &them);
1736         ast_rtp_get_us(rtp, &us);
1737
1738
1739         h323_native_bridge(p->cd.call_token, inet_ntoa(them.sin_addr), mode);
1740
1741         return 0;
1742
1743 }
1744
1745 static struct ast_rtp_protocol oh323_rtp = {
1746         get_rtp_info: oh323_get_rtp_peer,
1747         get_vrtp_info: oh323_get_vrtp_peer,
1748         set_rtp_peer: oh323_set_rtp_peer,
1749 };
1750
1751
1752 int load_module()
1753 {
1754         int res;
1755
1756         res = reload_config();
1757
1758         if (res) {
1759                 return 0;
1760         } else {
1761                 /* Make sure we can register our channel type */
1762                 if (ast_channel_register(type, tdesc, capability, oh323_request)) {
1763                         ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
1764                         h323_end_process();
1765                         return -1;
1766                 }
1767                 ast_cli_register(&cli_debug);
1768                 ast_cli_register(&cli_no_debug);
1769                 ast_cli_register(&cli_trace);
1770                 ast_cli_register(&cli_no_trace);
1771                 ast_cli_register(&cli_show_codecs);
1772                 ast_cli_register(&cli_gk_cycle);
1773                 ast_cli_register(&cli_hangup_call);
1774                 ast_cli_register(&cli_show_tokens);
1775
1776                 oh323_rtp.type = type;
1777                 ast_rtp_proto_register(&oh323_rtp);
1778
1779                 sched = sched_context_create();
1780                 if (!sched) {
1781                         ast_log(LOG_WARNING, "Unable to create schedule context\n");
1782                 }
1783                 io = io_context_create();
1784                 if (!io) {
1785                         ast_log(LOG_WARNING, "Unable to create I/O context\n");
1786                 }
1787
1788                 /* Register our callback functions */
1789                 h323_callback_register(setup_incoming_call,
1790                                                            setup_outgoing_call,
1791                                                            create_connection,
1792                                                            setup_rtp_connection,
1793                                                            cleanup_connection,
1794                                                            connection_made, send_digit);
1795
1796
1797                 /* start the h.323 listener */
1798                 if (h323_start_listener(port, bindaddr)) {
1799                         ast_log(LOG_ERROR, "Unable to create H323 listener.\n");
1800 //                      h323_end_process();
1801                         return -1;
1802                 }
1803
1804                 /* Possibly register with a GK */
1805                 if (gatekeeper_disable == 0) {
1806                         if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1807                                 ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1808 //                              h323_end_process();
1809                                 return 0;
1810                         }
1811                 }
1812                 /* And start the monitor for the first time */
1813                 restart_monitor();
1814         }
1815         return res;
1816 }
1817 int unload_module()
1818 {
1819         struct oh323_pvt *p, *pl;
1820
1821         if (!ast_mutex_lock(&iflock)) {
1822         /* hangup all interfaces if they have an owner */
1823         p = iflist;
1824         while(p) {
1825                 if (p->owner)
1826                         ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
1827                 p = p->next;
1828         }
1829         iflist = NULL;
1830         ast_mutex_unlock(&iflock);
1831         } else {
1832                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1833                 return -1;
1834         }
1835
1836         if (!ast_mutex_lock(&iflock)) {
1837                 /* destroy all the interfaces and free their memory */
1838                 p = iflist;
1839                 while(p) {
1840                         pl = p;
1841                         p = p->next;
1842                         /* free associated memory */
1843                         free(pl);
1844                 }
1845                 iflist = NULL;
1846                 ast_mutex_unlock(&iflock);
1847         } else {
1848                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1849                 return -1;
1850         }
1851         h323_gk_urq();
1852         h323_end_process();
1853
1854         /* unregister rtp */
1855         ast_rtp_proto_unregister(&oh323_rtp);
1856
1857         /* unregister commands */
1858         ast_cli_unregister(&cli_debug);
1859         ast_cli_unregister(&cli_no_debug);
1860         ast_cli_unregister(&cli_trace);
1861         ast_cli_unregister(&cli_no_trace);
1862         ast_cli_unregister(&cli_show_codecs);
1863         ast_cli_unregister(&cli_gk_cycle);
1864
1865         /* unregister channel type */
1866         ast_channel_unregister(type);
1867
1868         return 0;
1869
1870 }
1871
1872 int usecount()
1873 {
1874         int res;
1875         ast_mutex_lock(&usecnt_lock);
1876         res = usecnt;
1877         ast_mutex_unlock(&usecnt_lock);
1878         return res;
1879 }
1880
1881 char *description()
1882 {
1883         return desc;
1884 }
1885
1886 char *key()
1887 {
1888         return ASTERISK_GPL_KEY;
1889 }
1890
1891
1892
1893